WO2023074753A1 - Raccord de phare de véhicule - Google Patents

Raccord de phare de véhicule Download PDF

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Publication number
WO2023074753A1
WO2023074753A1 PCT/JP2022/039979 JP2022039979W WO2023074753A1 WO 2023074753 A1 WO2023074753 A1 WO 2023074753A1 JP 2022039979 W JP2022039979 W JP 2022039979W WO 2023074753 A1 WO2023074753 A1 WO 2023074753A1
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WO
WIPO (PCT)
Prior art keywords
light
lens
incident
light guide
emitted
Prior art date
Application number
PCT/JP2022/039979
Other languages
English (en)
Japanese (ja)
Inventor
佑太郎 小林
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Publication of WO2023074753A1 publication Critical patent/WO2023074753A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/27—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/45—Reversing lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a technical field of a vehicle lamp having a light guide lens that guides incident light in a predetermined direction.
  • a light source and a light guide lens are arranged in a lamp chamber, which is an internal space of a lamp outer housing composed of a cover and a lamp housing. Light emitted from the light source is guided by the light guide lens.
  • a type in which the light is emitted from the exit surface of see, for example, Patent Document 1).
  • the light emitted from the light source enters from the incident surface of the light guiding lens and is emitted by internal reflection (total reflection) while being guided.
  • the light guide lens is formed in a shape extending in a predetermined direction and has a substantially circular cross-sectional shape.
  • various parts are arranged in the lamp chamber in addition to the light guide lens.
  • an extension for shielding part of the parts, a reflector for reflecting light toward the cover side, and the like are arranged.
  • the light guide lens is a part that determines the range of light irradiation, and is formed in various shapes in consideration of functionality and design, so it is possible to properly emit light without impairing these functionality and design. It is desirable to secure the state.
  • the object of the vehicle lamp of the present invention is to reduce the thickness while ensuring an appropriate light emission state.
  • a vehicle lamp includes a light source for emitting light, an incident surface for receiving light emitted from the light source, and an emitting surface for emitting the light incident from the incident surface.
  • a light guiding lens formed with a plurality of reflecting lens steps scattered thereon, and a mounting member to which the light guiding lens is mounted, wherein the light guiding lens and the mounting member are arranged in a direction in which the light guiding lens and the mounting member are arranged.
  • the light guide lens is formed in a plate shape extending in the thickness direction, and the light guide lens is provided with a light emitting portion having the emitting surface and an attached portion projecting from the light emitting portion and attached to the attaching member, and the light emitting At least a part of the light guiding lens has a shape extending in a direction different from the thickness direction, and at least a part of the light guiding lens has a light emitting portion extending in two directions with respect to at least one of the attached portions.
  • the lens step is formed in a shape, and the entire lens step is formed by a curved surface.
  • the light guiding lens that is formed in a plate shape in the direction of alignment with the mounting member and that is at least partially curved.
  • the light is emitted from the light guide lens which is formed in a plate shape in the direction of alignment with the mounting member and at least a part of which is curved, a proper light emission state is ensured.
  • the thickness can be reduced.
  • FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1;
  • FIG. 3 is a perspective view of a reflector; It is a perspective view of a light guide lens.
  • FIG. 5 is a perspective view showing the light guide lens viewed from a direction different from that in FIG. 4;
  • FIG. 4 is a perspective view of a cover lens;
  • FIG. 7 is a perspective view showing the cover lens viewed from a direction different from that in FIG. 6; 9 to 13 all show a second embodiment of the vehicle lamp of the present invention, and this figure is a sectional view of the vehicle lamp.
  • FIG. 1 is a cross-sectional view taken along line II-II of FIG. 1
  • FIG. 3 is a perspective view of a reflector
  • It is a perspective view of a light guide lens.
  • FIG. 5 is a perspective view showing the light guide lens viewed from a direction different from that in FIG. 4;
  • FIG. 4 is a perspective view of a cover
  • FIG. 3 is a perspective view of a reflector; It is a perspective view of a light guide lens.
  • FIG. 11 is a perspective view showing the light guiding lens viewed from a direction different from that in FIG. 10;
  • FIG. 4 is an enlarged front view showing an incident state of light from an incident surface of a light guide;
  • FIG. 4 is a perspective view of a cover lens;
  • the front, back, up, down, left, and right directions of the vehicle lamp will be explained with reference to the vehicle, and the light irradiation direction will be the front.
  • the front, rear, up, down, left, and right directions shown below are for convenience of explanation, and the implementation of the present invention is not limited to these directions.
  • the vehicle lamp 1 is used, for example, as a so-called combination lamp that functions as a tail lamp and a back lamp.
  • the vehicle lamp 1 is not limited to a combination lamp functioning as a tail lamp and a back lamp, and may be a single lamp functioning as a vehicle indicator light or another combination lamp.
  • a vehicle lamp 1 includes a lamp housing 2 having an opening at its front end and a cover 3 closing the opening of the lamp housing 2 (see FIGS. 1 and 2).
  • a lamp housing 4 is formed by the lamp housing 2 and the cover 3, and an internal space of the lamp housing 4 is formed as a lamp chamber 4a.
  • a substrate 5 is arranged in the lamp chamber 4a so as to face substantially in the front-rear direction.
  • Two light sources 6 are mounted on the front surface of the substrate 5 so as to be separated from each other in the left and right direction.
  • the light source 6 for example, a light emitting diode (LED) is used.
  • a reflector 7, a light guiding lens 8 and a cover lens 9 are arranged in order from the rear side in the lamp chamber 4a (see FIG. 2).
  • the reflector 7 has a function of reflecting light and also functions as a mounting member for mounting the light guide lens 8 .
  • the reflector 7 has a thickness direction in the front-rear direction and is formed in a thin annular shape (see FIGS. 2 and 3).
  • the outer peripheral portion of the front surface of the reflector 7 is formed as a reflecting surface 10 which is vapor-deposited with aluminum or the like except for the upper portion.
  • the holding portion 11 is formed with a plurality of support pins 11a projecting forward and a plurality of screw holes 11b opening forward.
  • insertion holes 7a, 7a are formed so as to be separated from each other in the left and right direction.
  • An inner hole formed in the reflector 7 is formed as an arrangement hole 7b.
  • the reflector 7 is attached to the lamp housing 2 by screws or the like and placed in the lamp chamber 4a.
  • the light guiding lens 8 has a thickness direction in the front-rear direction, and is formed in a plate shape in the thickness direction (see FIGS. 2, 4 and 5).
  • the light guide lens 8 has a substantially rectangular cross-sectional shape such as a rectangular shape, and has a thickness of, for example, 3 mm or less.
  • the light guiding lens 8 is made of, for example, a transparent resin material, and has a substantially arcuate light emitting portion 12 that opens upward and a projecting shape that protrudes from the upper end portion of the light emitting portion 12 in a direction approaching each other in the left-right direction. It has portions 13, 13, starting ends 14, 14 connected to the protruding portions 13, 13, and an attached portion 15 protruding inward from the light emitting portion 12 or the protruding portions 13, 13. As shown in FIG.
  • the light emitting portion 12 is formed in a substantially arc shape, substantially the entirety thereof is formed in a curved shape.
  • a front surface of the light emitting portion 12 is formed as an emitting surface 12a from which light is emitted.
  • a plurality of reflection steps 12b which are lens steps such as fish-eye steps for internal reflection (total reflection) of light, are formed on the rear surface of the light emitting portion 12. As shown in FIG.
  • the reflection steps 12b are formed with a higher density as they are separated from the projections 13,13. Therefore, the density of the reflective steps 12b in the light emitting portion 12 is lowest in the portions that are continuous with the protrusions 13 and highest in the intermediate portions in the circumferential direction.
  • a plurality of reflecting steps 12b are positioned in a scattered manner, and the whole is formed into a curved surface (see the enlarged view of FIG. 5).
  • the reflecting step 12b is formed, for example, in a hemispherical or conical shape. However, the shape of the reflecting step 12b is arbitrary as long as it is entirely curved.
  • the portion where the reflection step 12b has the highest density is not limited to the central portion in the longitudinal direction of the light emitting portion 12.
  • the light guiding lens 8 is arranged in a state inclined with respect to the front-rear direction. In some cases, considering the state of forward light emission, the portion where the density of the reflection step 12b is highest is shifted from the central portion in the longitudinal direction of the light emission portion 12, and the light emission surface 12a It is possible to ensure a high uniformity of the light emitted from the whole.
  • the starting end 14 is curved so as to be displaced rearward as it is separated from the projecting portion 13 .
  • a tip surface of the starting end portion 14 is formed as an incident surface 14a on which light is incident.
  • the mounting portion 15 is provided inside the light emitting portion 12 and has a mounting hole 15a.
  • the light guide lens 8 is formed in such a shape that the light emitting portion 12 extends in two directions with respect to at least one attached portion 15 .
  • the light emitting portion 12 is formed in a shape extending in two directions, the P direction and the Q direction, with one attached portion 15X as a reference (see FIG. 4).
  • the light guide lens 8 is held in position on the reflector 7 by inserting the support pin 11a into the mounting hole 15a with the light emitting portion 12 positioned in front of the reflecting surface 10. As shown in FIG.
  • the light guiding lens 8 has its leading ends 14, 14 inserted through the insertion holes 7a, 7a from the front side, respectively, and its incident surfaces 14a, 14a facing the light sources 6, 6 mounted on the substrate 5, respectively (see FIG. 2). reference).
  • the cover lens 9 is made of a transparent or translucent resin material, and has a substantially arcuate light transmitting portion 16 and mounting piece portions 17, 17, 17 projecting inwardly from the light transmitting portion 16. (see FIGS. 2, 6 and 7).
  • the light transmitting portion 16 is composed of a step forming portion 18 formed in a plate shape facing the front-rear direction, and side portions 19, 19 protruding substantially rearward from the outer peripheral portion and the inner peripheral portion of the step forming portion 18, respectively. Therefore, the light transmitting portion 16 is formed in a substantially U-shaped cross-section opening rearward. A plurality of diffusion steps 18 a are formed on the rear surface of the step forming portion 18 .
  • the attached piece portion 17 protrudes from the rear end portion of the inner side surface portion 19 . At least one of a positioning hole 17a and a screw insertion hole 17b is formed in each of the attached pieces 17, 17, 17. As shown in FIG.
  • the cover lens 9 is attached to the reflector 7 with the light transmitting portion 16 covering the light emitting portion 12 of the light guiding lens 8 from the front side.
  • the cover lens 9 is positioned with respect to the reflector 7 by inserting the support pins 11a into the positioning holes 17a, and the reflector 7 is attached to the reflector 7 by screwing mounting screws (not shown) inserted through the screw insertion holes 17b into the screw holes 11b. can be attached to
  • An inner cover 20 is arranged in the arrangement hole 7b of the reflector 7 (see FIGS. 1 and 2).
  • a light source (not shown) different from the light sources 6, 6, for example, a light emitting diode is mounted on the substrate 5 behind the inner cover 20. Light emitted from this light source is controlled by the inner cover 20 and directed to the outside. be irradiated. The light that is controlled and emitted by the inner cover 20 is emitted, for example, as light as a back lamp.
  • An extension 21 is arranged in the lamp chamber 4a.
  • the extension 21 shields the area outside the inner cover 20 and the upper portion of the cover lens 9 from the front side inside the cover lens 9 .
  • the vehicle lamp 1 configured as described above, when light is emitted forward from the light sources 6, 6, the emitted light is incident on the light guiding lens 8 from the incident surfaces 14a, 14a, respectively, and the starting end From the portions 14 , 14 , the light is guided by the light emitting portion 12 via the projecting portions 13 , 13 .
  • the light guided by the light emitting portion 12 is internally reflected (total reflected) at the reflecting step 12b and emitted from the emitting surface 12a.
  • the light emitted from the emission surface 12a is emitted forward from the cover lens 9 in a state of being diffused by the diffusion step 18a of the cover lens 9, passes through the cover 3, and is irradiated to the outside.
  • the light is emitted in order from the light emitting portion 12 formed in a substantially arc shape, and then emitted in a diffused state from the light transmitting portion 16 formed in a substantially arc shape, so that the light is uniform over a wide area. is irradiated in a
  • the density of the reflection steps 12b formed on the light guide lens 8 increases with increasing distance from the incident surfaces 14a, 14a.
  • the light guided by the light guide lens 8 is reflected by the reflection step 12b with a higher density as it goes away from the incident surfaces 14a, 14a, and is emitted from the exit surface 12a.
  • the output efficiency from the surface 12a is increased, the influence of light attenuation according to the light guide distance is suppressed, and the uniformity of the light output from the light guide lens 8 can be improved.
  • the leading end portion 14 of the light guiding lens 8 is formed in a curved shape, the direction in which the light emitted from behind the leading end portion 14 is guided in a short distance (approach section L1 shown in FIG. 2) is changed. As a result, the space in the front-rear direction in which the reflector 7 and the light guide lens 8 are aligned is reduced, and the vehicle lamp 1 can be miniaturized. be able to.
  • a vehicle lamp 1A according to the second embodiment is used, for example, as a decorative lamp.
  • the vehicle lamp according to the second embodiment as in the vehicle lamp 1 according to the first embodiment, it may be used as a single lamp or a combination lamp having other functions. good.
  • a vehicle lamp 1A includes a lamp housing 2 having an opening at its front end and a cover 3 closing the opening of the lamp housing 2 (see FIG. 8).
  • a lamp housing 4 is formed by the lamp housing 2 and the cover 3, and an internal space of the lamp housing 4 is formed as a lamp chamber 4a.
  • a substrate 5 is arranged in the lamp chamber 4a so as to face substantially in the vertical direction.
  • a light source 6 is mounted on the upper surface of the substrate 5 .
  • the light source 6 for example, a light emitting diode is used.
  • a reflector 7A, a light guide lens 8A and a cover lens 9A are arranged in order from the rear side in the lamp chamber 4a.
  • the reflector 7A has a function of reflecting light and also functions as a mounting member for mounting the light guide lens 8A.
  • the reflector 7A has a thickness direction in the front-rear direction and is formed in a thin annular shape (see FIGS. 8 and 9). A portion of the front surface of the reflector 7A, excluding the upper portion, is formed as a reflecting surface 30 which is vapor-deposited with aluminum or the like.
  • Mounting protrusions 31, 31, and 31 projecting outward are provided on the reflector 7A so as to be spaced apart in the circumferential direction.
  • two mounting protrusions 31 are formed with screw holes 31a, 31a, and one mounting protrusion 31 is provided as an engaging protrusion.
  • a screw insertion hole is formed in the attachment projection 32 .
  • the reflector 7A is arranged in the lamp chamber 4a with the mounting projections 32, 32, ... mounted on the lamp housing 2 by screws or the like.
  • the light guide lens 8A has a thickness direction in the front-rear direction and is formed in a plate shape in the thickness direction (see FIGS. 8, 10 and 11).
  • the light guiding lens 8A has a substantially rectangular cross-sectional shape such as a rectangular shape, and has a thickness of, for example, 3 mm or less.
  • the light guide lens 8A is made of, for example, a transparent resin material, and has a substantially arc-shaped light emitting portion 33 that is open upward and attached portions 34, 34 that protrude from the light emitting portion 33, respectively. there is A mounting hole 34 a is formed in the mounting portion 34 .
  • the light emitting portion 33 is formed in a substantially arcuate shape, substantially the entirety thereof is formed in a curved shape.
  • a front surface of the light emitting portion 33 is formed as an emitting surface 33a from which light is emitted.
  • An intermediate portion of the light emitting portion 33 for example, a central portion in the longitudinal direction, is formed with a recess opening downward, and a peripheral surface forming this recess is formed as an incident surface 35 (see FIG. 12).
  • the position where the recess is formed is not limited to the central portion in the longitudinal direction, and may be a position other than the central portion in the longitudinal direction.
  • the incident surface 35 is positioned directly above the light source 6 mounted on the substrate 5. As shown in FIG.
  • a diffusion step (not shown) is formed on the incident surface 35 .
  • the incident surface 35 has a first portion 35a, a second portion 35b, and a first portion 35a in order in the circumferential direction, and the curvature of the second portion 35b is larger than the curvatures of the first portions 35a, 35a. .
  • the degree of diffusion of the light incident from the second portion 35b is reduced from the first portions 35a, 35a. It is made larger than the degree of diffusion of incident light. Therefore, the light incident from the first portion 35a is diffused in a smaller range than the light incident from the second portion 35b. For example, the light incident from the first portion 35a is diffused at an angle ⁇ 1. , the light incident from the second portion 35b is diffused over an angle .theta.2 larger than the angle .theta.1 (see FIG. 12).
  • Light is emitted from the light source 6 in a state of spreading at a constant angle (directivity angle C), but the brightness decreases as the angle with respect to the optical axis S increases. Accordingly, high-brightness light is likely to enter the second portion 35b, and low-brightness light is likely to enter the first portions 35a, 35a.
  • the amount of light guided by the light guiding lens 8A is easily made uniform regardless of the incident position on the incident surface 35, and the light is guided. It becomes possible to improve the uniformity of the brightness of the light emitted from the lens 8A.
  • a reflection step 33b which is a lens step such as a fish-eye step for internally reflecting (total reflecting) light, is formed on the rear surface of the light emitting portion 33 (see FIG. 11).
  • the reflective steps 33b are formed at a higher density as the distance from the incident surface 35 increases. Therefore, the density of the reflection steps 33b in the light emitting portion 33 is lowest near the incident surface 35 and highest at the tip side portion of the light guiding lens 8A.
  • a plurality of reflecting steps 33b are positioned in a scattered manner, and the entire surface is formed into a curved surface (see the enlarged view of FIG. 5).
  • the reflecting step 33b is formed, for example, in a hemispherical or conical shape. However, the shape of the reflecting step 33b is arbitrary as long as it is entirely curved.
  • the portion where the reflection step 33b has the highest density is not limited to the portion on the tip side of the light emitting portion 33.
  • the portion of the reflection step 33b where the density is the highest is shifted from the tip side portion of the light emission portion 33, and the light is emitted from the entire emission surface 33a. It is possible to ensure a high uniformity of the emitted light.
  • the light guiding lens 8A is formed in such a shape that the light emitting portion 33 extends in two directions with at least one attached portion 34 as a reference.
  • the light emitting portion 33 is formed in a shape extending in two directions of the P direction and the Q direction with one attached portion 34X as a reference (see FIG. 12).
  • the light guiding lens 8A is held by the reflector 7A with the light emitting portion 33 positioned in front of the reflecting surface 30.
  • the light guiding lens 8A is held in a state of being positioned by the reflector 7A by inserting the mounting protrusions 31, 31 from the rear side into the mounting holes 34a, 34a of the mounting portions 34, 34, respectively.
  • the cover lens 9A is made of a transparent or translucent resin material, and has a substantially arc-shaped light transmitting portion 36 and mounting piece portions 37, 37, 37 projecting from the light transmitting portion 36. (See FIGS. 8 and 13).
  • the light transmitting portion 36 has a thick front and rear thickness and a diffusion step 36a on the front surface.
  • two attached piece portions 37, 37 are formed with screw insertion holes 37a, 37a, and one attached piece portion 37 is formed with an engaging hole 37b.
  • the cover lens 9A is attached to the reflector 7A with the light transmitting portion 36 covering the light emitting portion 33 of the light guiding lens 8A from the front side.
  • a mounting screw (not shown) inserted through the screw insertion hole 37a is screwed into the threaded hole 31a in a state where the mounting projection 31 provided as an engaging projection is inserted into the engaging hole 37b and engaged. It is attached to the reflector 7A by being attached.
  • An extension 38 is arranged in the lamp chamber 4a (see FIG. 8).
  • the extension 38 shields the portion of the cover lens 9A other than the light transmitting portion 36 from the front side.
  • the vehicle lamp 1A configured as described above, when light is emitted upward from the light source 6, the emitted light is incident on the light guide lens 8A through the incident surface 35 and internally reflected at the reflection step 33b. (total reflection) and emitted from the emission surface 33a. At this time, there is a possibility that leaked light is emitted rearward from the light emitting portion 33, but the leaked light is reflected forward by the reflecting surface 30 of the reflector 7A, is transmitted through the light emitting portion 33, and is emitted from the emitting surface 33a. be done.
  • the light emitted from the exit surface 33a is diffused by the diffusion step 36a of the cover lens 9A and is emitted forward from the cover lens 9A, transmitted through the cover 3, and irradiated to the outside.
  • the light is emitted in order from the light emitting portion 33 formed in a substantially arc shape, and then emitted in a diffused state from the light transmitting portion 36 formed in a substantially arc shape, so that the light is uniform over a wide area. is irradiated in a
  • the density of the reflection steps 33b formed on the light guiding lens 8A increases with increasing distance from the incident surface 35.
  • the light guided by the light guiding lens 8A is reflected by the reflecting steps 33b whose density is increased as it goes away from the incident surface 35, and is emitted from the exit surface 33a.
  • the output efficiency from the light guide lens 8A is increased, the influence of light attenuation according to the light guide distance is suppressed, and the uniformity of the light emitted from the light guide lens 8A can be improved.
  • a recess is formed through the light guiding lens 8A in the thickness direction and is open in a direction orthogonal to the thickness direction, and the peripheral surface forming the recess is formed as the incident surface 35.
  • the substrate 5 in a direction perpendicular to the direction in which the reflector 7A and the light guide lens 8A are arranged (the front-rear direction).
  • the installation space can be reduced, and the thickness of the vehicle lamp 1A can be reduced.
  • the degree of diffusion of the light incident from the incident surface 35 is made different depending on the portion of the incident surface 35 where the light is incident.
  • the degree of diffusion of the light incident from the incident surface 35 differs depending on the incident portion, it is possible to set the degree of diffusion according to the direction in which the light is guided, and the light emitted from the light guiding lens 8A. It is possible to improve the uniformity of the
  • the light guide lenses 8 and 8A are formed in a plate shape in which the direction in which the light guide lenses 8 and 8A and the reflectors 7 and 7A are arranged is the thickness direction,
  • the light guide lenses 8 and 8A are formed in a shape extending in a direction different from the thickness direction, and at least a part thereof is formed in a curved shape.
  • the light is emitted from the light guide lenses 8, 8A which are formed in a plate shape in the direction along which the reflectors 7, 7A are arranged and at least a part of which is curved, a proper light emission state is ensured.
  • the thickness of the vehicle lamp 1, 1A can be reduced.
  • the light guiding lenses 8 and 8A are formed in such a shape that the light emitting portions 12 and 33 extend in two directions with respect to at least one of the attached portions 15 and 15A, the direction in which the light emitting portions 12 and 33 extend.
  • the attached portions 15 and 15A are positioned in the middle portion, and the light emitting portions 12 and 33 can be stably attached to the reflectors 7 and 7A.
  • the reflection steps 12b and 33b are formed entirely into curved surfaces, the curvature, shape, etc. of the curved surfaces can be easily changed arbitrarily, and the degree of freedom in light reflection control can be improved.
  • the light emitting portions 12 and 33 are formed in a shape extending in two directions, the light emitting portions 12 and 33 can be It is easy to form a plate shape, and it is possible to reduce the thickness of the vehicular lamp 1, 1A while appropriately performing light reflection control.
  • the light emitting portions 12 and 33 can be It is easy to form a plate shape, and it is possible to reduce the thickness of the vehicular lamp 1, 1A while appropriately performing light reflection control.
  • by adopting a configuration in which a plurality of reflection steps 12b and 33b are scattered it is possible to improve the visibility of the light guide lenses 8 and 8A. Visibility can be improved with respect to the reflective steps 12b and 33b on the front side.
  • cover lenses 9 and 9A are provided to cover the light guide lenses 8 and 8A from the opposite side of the reflectors 7 and 7A and diffuse the light emitted from the light guide lenses 8 and 8A.
  • the light emitted from the light guiding lenses 8 and 8A is diffused by the cover lenses 9 and 9A and irradiated, so that a wide area can be uniformly irradiated.
  • the reflectors 7 and 7A which also function as mounting members, are arranged behind the light guide lenses 8 and 8A.
  • a mounting member other than 7A may be arranged.
  • a black, gray, or white shielding member (base member) for shielding each part arranged in the lamp chamber 4a is arranged.
  • the mounting members have both a function of mounting the light guide lenses 8 and 8A and a function of reflecting the light guided by the light guide lenses 8 and 8A.
  • the functionality of the mounting member can be improved, and the number of parts can be reduced because there is no need for a dedicated mounting member.
  • SYMBOLS 1 Vehicle lamp, 6... Light source, 7... Reflector (mounting member), 8... Light guide lens, 9... Cover lens, 12a... Emission surface, 12b... Reflection step, 14a... Entrance surface, 15... Mounting part, 18a...Diffusion step 1A...Vehicle lamp 7A...Reflector (mounting member) 8A...Light guide lens 9A...Cover lens 33a...Emission surface 33b...Reflection step 34...Mounted part 35...Incident surface , 36a... diffusion step

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Ce raccord de phare de véhicule comprend une source de lumière pour émettre de la lumière, une lentille de guidage de lumière qui présente une surface d'incidence sur laquelle est incidente la lumière émise par la source de lumière, et une surface d'émission pour émettre de la lumière incidente à partir de la surface incidente, et dans laquelle une pluralité d'étages de lentille qui réalisent une réflexion de surface interne de la lumière sont formés dans un état dispersé, et un élément de fixation auquel est fixée la lentille de guidage de lumière, dans laquelle : la lentille de guidage de lumière adopte une forme de plaque ayant un sens d'épaisseur dans une direction d'agencement de la lentille de guidage de lumière et de l'élément de fixation ; la lentille de guidage de lumière est pourvue d'une partie d'émission de lumière comprenant la surface d'émission, et de parties fixées qui font saillie à partir de la partie d'émission de lumière et qui sont fixées à l'élément de fixation ; la partie d'émission de lumière adopte une forme de plaque s'étendant dans une direction différente du sens de l'épaisseur, et comporte au moins une partie qui est incurvée ; la lentille de guidage de lumière adopte une forme telle que la partie d'émission de lumière s'étend dans deux directions par rapport à au moins une partie fixée ; et les étages de lentille dans leur ensemble adoptent la forme d'une surface incurvée.
PCT/JP2022/039979 2021-10-29 2022-10-26 Raccord de phare de véhicule WO2023074753A1 (fr)

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JP2021177297 2021-10-29

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005267928A (ja) * 2004-03-17 2005-09-29 Chatani Sangyo Kk 曲面体等の均一発光方法及び均一発光品
JP2007188645A (ja) * 2006-01-11 2007-07-26 Fujitsu Kasei Kk バックライトユニット
JP2014107081A (ja) * 2012-11-27 2014-06-09 Sakae Riken Kogyo Co Ltd 発光装置
JP2018073638A (ja) * 2016-10-31 2018-05-10 スタンレー電気株式会社 車両用灯具
JP2020027690A (ja) * 2018-08-09 2020-02-20 株式会社小糸製作所 車輌用灯具
WO2021153419A1 (fr) * 2020-01-31 2021-08-05 株式会社小糸製作所 Lampe de véhicule

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005267928A (ja) * 2004-03-17 2005-09-29 Chatani Sangyo Kk 曲面体等の均一発光方法及び均一発光品
JP2007188645A (ja) * 2006-01-11 2007-07-26 Fujitsu Kasei Kk バックライトユニット
JP2014107081A (ja) * 2012-11-27 2014-06-09 Sakae Riken Kogyo Co Ltd 発光装置
JP2018073638A (ja) * 2016-10-31 2018-05-10 スタンレー電気株式会社 車両用灯具
JP2020027690A (ja) * 2018-08-09 2020-02-20 株式会社小糸製作所 車輌用灯具
WO2021153419A1 (fr) * 2020-01-31 2021-08-05 株式会社小糸製作所 Lampe de véhicule

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